Ⅴ. 单项选择（每小题1分， 共15分）
( ) 21. —Look! My father is sleeping under umbrella on the beach.
—Dear, that’s big beach umbrella.
A. a; a B. an; an
C. an; a D. a; an
( ) 22. —I had a hamburger, salad, noodles and beef soup for lunch.
—Good, but I don’t like a heavy meal at lunchtime .
A. you B. yourself
C. me D. myself
( ) 23. The question is quite difficult, so students can work it out.